Description of Lightweight Insulating Castable

Introduction to the use of lightweight thermal insulation castables

1. Lightweight insulating castable is suitable for mechanical spraying, pouring or smearing.

2. The light weight casting production has been accurately measured according to the ratio. Considering the timeliness of the bonding agent, the light-weight material and the bonding agent are packaged separately. The light-weight material is packaged in a plastic bag inside the woven bag. The bonding agent is the original packaging. Five bags of light weight materials plus one bag of binder are the smallest batching unit.

3. Transportation and storage

(1) Transportation should depend on the distance between the factory and the construction site. For shorter production (allowable within 500km), you can choose to transport by car, and you can choose to ship by train for longer distances.

(2) Lightweight castables should be placed in a dry and well-ventilated place to avoid direct sunlight or excessively high temperature.

4. The best product validity period is four months.

5. Equipment

(1) Forced mixer (in the case of small usage and limited conditions, manual mixing may be considered).

(2) With complete common sporadic tools (straight ruler, plastering knife, spatula, trolley, bucket), etc.

(3) Use clean domestic water to ensure the normal solidification of the castable (PH value 6.5-7)

(4) Take timely measures to prevent rain and water.

(5) The construction site should have complete safety measures.

6. Mixing

(1) The temperature at the construction site is best at +5-+30°C. If the temperature is too high, cooling measures should be taken, and good insulation measures should be taken during winter construction.

(2) Clean mixing equipment and other tools, and prepare quantitative clean water in strict accordance with the requirements. The water temperature in winter is preferably 15-20°C. The mixer should be placed near water and electricity.

(3) Determine the amount of one-time stirring according to the actual dosage. Pour the mixed light materials first, and then add the binder, dry mix in advance for 2-3 minutes, so that the light materials and the binder are uniformly mixed, and the appearance is basically the same. Then add about 80% of the total water consumption, and finally add water according to the dry and wet procedures of the slurry. Continue to stir for 3-5 minutes. Under the conditions of construction and workability, strictly control the amount of water added, generally 40- 50%, the whole stirring time is controlled within 5-8 minutes. The use time of each well-mixed material should not exceed 30 minutes, and the amount of water should be adjusted according to the construction site and construction method.

7. Construction

When pouring during construction, the thickness of more than 100mm can be formed by manual tamping, and it can be compacted with a wooden stick. The formwork of the supporting template can also be used for construction. It can also be vibrated with a small vibrating rod, but the vibration time should not be too long to avoid Lightweight pellets float up and cause uneven density. When the thickness is thin, it can be applied directly by hand, and the moisture is reduced accordingly to prevent collapse or the generation of holes.

8. Demoulding

Usually, the mold can be demolded after 12 hours after construction (24 hours in winter). The mold must be knocked gently during demolding to prevent brutal demolding and damage to the casting material and the mold. Due to the high moisture content of the lightweight thermal insulation castables, the construction of the wear-resistant refractory layer should be carried out after more than 2 days of natural maintenance (pay attention to ventilation and moisture removal).

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